Since Einstein introduced special relativity, the theory and the special status it gives to the speed of light have appeared iron-clad.

自从爱因斯坦提出狭义相对论以来，这个理论和其把特殊地位赋给了光速，已经铁证如山。

youdao

Iron clad theory?

铁板一块的理论？

youdao

The complex sits over a below grade car park with light timber framing clad in corrugated iron and plastered concrete panels.

这个综合住宅区坐落在地下停车场上方，轻木骨架用波状钢和石膏混凝土面板包覆。

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They say the UN atomic watchdog agency,the IAEA, was briefed on Wednesday night and presented with an "iron clad" case.

VOA: standard.2009.09.25

Iron clad secrecy and a very particular set of rules.

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But not so iron clad that the GOP didn't reluctantly consent to 6.2 trillion dimes in tax increases only this January in return for zero dimes of spending restraint.

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Blessed with an iron-clad stomach, I could eat my way up and down the avenue all day.

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